Bibliographic Metadata

Buck Converters in 0.18 m HV-CMOS technology / von Nataša Pojak
AuthorPojak, Nataša
CensorZimmermann, Horst
PublishedWien, 2017
Descriptionxvi, 110 Seiten : Illustrationen, Diagramme
Institutional NoteTechnische Universität Wien, Dissertation, 2017
Zusammenfassung in deutscher Sprache
Bibl. ReferenceOeBB
Document typeDissertation (PhD)
Keywords (DE)DC / DC converters / circuit design
Keywords (GND)Konverter <Elektronik> / Abwärtsumsetzer / CMOS / Schaltungsentwurf
URNurn:nbn:at:at-ubtuw:1-103915 Persistent Identifier (URN)
 The work is publicly available
Buck Converters in 0.18 m HV-CMOS technology [42.18 mb]
Abstract (English)

This thesis deals with buck converters in 0.18m HV-CMOS technology. Research in the field of monolithic DC-DC converters with emphasis on approaches which lead to full integration of the power devices and regulation loop on the chip, is performed. The two-stage converter with output power of several watts and with switching transistors implemented by NMOS transistors, potentially enables reaching better performances compared to the standard solutions, but at the same time, introduces new difficulties and challenges, which are all addressed in this work. The focus in the thesis will be on the careful calculations and dimensioning of the transistors and circuits, their design and layout, implementation, and finally on the simulation and measurement results of the converters. The work furthermore proposes a novel integrated bootstrap circuit, which provides the voltage overdrive for the gate of the High-Side (HS) switching transistor without using an external diode nor additional voltage supply, and a novel integrated current sensing circuit with included comparator function, eliminating the need for a separate comparator circuit, and concurrently making the whole regulation loop more precise and robust.

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